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B777 flight crew reported the right flaperon malfunction during cruise resulted in a return to the departure airport.
| Attributes | |
| ACN | 1699548 |
| Time | |
| Date | 201911 |
| Local Time Of Day | 1201-1800 |
| Place | |
| Locale Reference | ZZZ.ARTCC |
| State Reference | US |
| Environment | |
| Flight Conditions | VMC |
| Light | Daylight |
| Aircraft 1 | |
| Make Model Name | B777 Undifferentiated or Other Model |
| Operating Under FAR Part | Part 121 |
| Flight Phase | Cruise |
| Flight Plan | IFR |
| Component | |
| Aircraft Component | Flap Control (Trailing & Leading Edge) |
| Person 1 | |
| Function | First Officer Pilot Flying |
| Qualification | Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) Flight Crew Multiengine |
| Experience | Flight Crew Last 90 Days 101 Flight Crew Total 24950 Flight Crew Type 15075 |
| Person 2 | |
| Function | Captain Pilot Not Flying |
| Qualification | Flight Crew Multiengine Flight Crew Instrument Flight Crew Air Transport Pilot (ATP) |
| Events | |
| Anomaly | Aircraft Equipment Problem Critical |
Narrative:
Our flight was dispatched with a flaperon status message displayed. Maintenance disconnected 1 of 2 sensors and sent us on our way. About 35 minutes into the flight we felt a sharp jolt then an aircraft vibration which was significant. We checked all systems and found we had an amber X on the right flaperon along with a 20 degree left yoke displacement.we had a complete system failure at that point. After the captain conferred with maintenance; dispatch and the crew it was mutually agreed upon not to continue the flight and return to ZZZ. None of the personnel contacted could give us information on how our fuel burn would be over a xa:06 min flight. Flying over [international] airspace with all these unknowns and the possibility of landing short was not a good decision; we returned to ZZZ where proper maintenance could be performed.
Original NASA ASRS Text
Title: B777 flight crew reported the right flaperon malfunction during cruise resulted in a return to the departure airport.
Narrative: Our flight was dispatched with a flaperon status message displayed. Maintenance disconnected 1 of 2 sensors and sent us on our way. About 35 minutes into the flight we felt a sharp jolt then an aircraft vibration which was significant. We checked all systems and found we had an Amber X on the right flaperon along with a 20 degree left yoke displacement.We had a complete system failure at that point. After the Captain conferred with Maintenance; dispatch and the crew it was mutually agreed upon not to continue the flight and return to ZZZ. None of the personnel contacted could give us information on how our fuel burn would be over a XA:06 min flight. Flying over [international] airspace with all these unknowns and the possibility of landing short was not a good decision; we returned to ZZZ where proper maintenance could be performed.
Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.